dokuwiki\Form\DropdownElement::getFirstOption PHP Method

    protected function getFirstOption()
    {
        $options = $this->options();
        if (!empty($options)) {
            return (string) array_shift(array_keys($options));
        }
        foreach ($this->optGroups as $optGroup) {
            $options = $optGroup->options();
            if (!empty($options)) {
                return (string) array_shift(array_keys($options));
            }
        }
    }